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https://issues.apache.org/jira/browse/MAPREDUCE-478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12743483#action_12743483
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Tsz Wo (Nicholas), SZE commented on MAPREDUCE-478:
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> Looks like Hudson had some trouble running tests... they work fine on my dev
> box.
The failing tests may be caused by HADOOP-6192 since it updated
hadoop-core-0.21.0-dev.jar in MapReduce.
> separate jvm param for mapper and reducer
> -----------------------------------------
>
> Key: MAPREDUCE-478
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-478
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Koji Noguchi
> Assignee: Arun C Murthy
> Priority: Minor
> Fix For: 0.21.0
>
> Attachments: HADOOP-5684_0_20090420.patch,
> MAPREDUCE-478_0_20090804.patch, MAPREDUCE-478_0_20090804_yhadoop20.patch,
> MAPREDUCE-478_1_20090806.patch, MAPREDUCE-478_1_20090806_yhadoop20.patch,
> MAPREDUCE-478_2_20090813.patch, MAPREDUCE-478_2_20090813.patch,
> MAPREDUCE-478_2_20090813_yhadoop.patch
>
>
> Memory footprint of mapper and reducer can differ.
> It would be nice if we can pass different jvm param (mapred.child.java.opts)
> for mappers and reducers.
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